Details. I used I Love This Yarn. The color was Greybeard. I had two partial skeins and a full skein. I ran out at the last couple rows but I found a leftover ball from the same skein and was able to finish it.
I used an I hook. The "hill to hill" measurement was 22". The top to bottom of one section was 18" and the measurement around was approximately 90".
I have already started another one!
I also made a slouchy hat and ran into the same problem. I thought I had enough yarn, but unfortunately, not. There was no label so not sure which yarn this was.
I did finish a hat and it turned out okay but not as "slouchy" as it might have been. It would fit a medium size lady's head. It was a teensy bit large for me but I have a small head. I could have worn it though.